Third, the difference between ordinary waste heat evaporator: the technical content of ordinary waste heat evaporator heat utilization: general waste heat utilization of waste heat evaporators are generally used after the first flash steam ejector (hereinafter referred to as the heat pump) compressed high salt crystallization evaporator, But mix the proportion of waste heat steam pump 5: 1. Utilization of waste heat is at the end, most of the heat generated steam is used, you can not play a good role in waste heat utilization, but increased the cost of investment. ③ direct contact type. Heating medium heat in direct contact with the solution, such as submerged combustion evaporator. Evaporator during operation of high salt crystals evaporator specifications, to spend a lot of heating steam, in order to save heating steam, can be multi-effect evaporation plant and a vapor recompression evaporator. Evaporator is widely used in chemical, light industry and other sectors.